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Betta imbellis in Singapore
Crescent betta

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Betta imbellis   Ladiges, 1975
Family:	Osphronemidae (Gouramies) , subfamily: Macropodusinae			picture (Beimb_u0.jpg) by Kopic, G.
Order:	Perciformes  (perch-likes)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Crescent betta
Max. size:	6.0 cm SL (male/unsexed; Ref. 57235)
Environment:	benthopelagic; pH range: 6 - 7; dH range: 5 - 19
Climate:	tropical; 24 - 28°C
Global Importance:	aquarium: commercial
Resilience:	High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Distribution:	Asia: Thailand, Malaysia, Singapore and Indonesia.
Diagnosis:	Diagnosed by having the following combination of characters: A bright red crescent on distal edge of caudal fin; absence of caudal transverse bars; dorsal transverse bars on distal two-thirds of dorsal fin; iridescent blue opercle scales; body dark brown to black; lateral scales 30-32; body depth 24.2-30.1% SL; dorsal-fin origin above lateral scales 15-17 (mode 16); length of dorsal-fin fin base 12.9-18.9% SL; and height of pectoral-fin origin 14.8-18.9% SL (Ref. 56613).
Biology:	Occurs usually in stagnant pools and ditches in clear to brown water (Ref. 56613). Found also in lowland swamps and paddy field. Bubble nest builder species (Ref. 57235). Eggs shrink to the bottom and were then collected by one or both parents and were embedded among the foam bubbles in the nest (Ref. 41595)
Threatened:	Not Evaluated, see IUCN Red List  , (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Kottelat, M., A.J. Whitten, S.N. Kartikasari and S. Wirjoatmodjo. 1993. (Ref. 7050)
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Singapore country information
Common names:	[ No common name ]		Ref:
Status:	introduced		Ref:  Tan, H.H. and P.K.L. Ng, 2005
Salinity:	freshwater
Regulations:	no regulations		Ref:
Uses:	no uses
Comments:	It is uncertain whether this was ever native to Singapore but if introduced, original stock may have come from both Thailand and Malaysia (Ref. 38466). Also Ref. 56613.
Country Information:	www.cia.gov/cia/publications/factbook/geos/sn.html
Occurrences:	Occurrences    Point map
Main Ref:	Ng, P.K.L., L.M. Chou and T.J. Lam, 1993
Update

More information:	Countries FAO areas Occurrences Introductions Ecosystem Ecology Diet Food items Food consumption Ration Predators Ciguatera Fish loss Common names Synonyms Pictures Sounds Reproduction Maturity Spawning Eggs Egg dev. Larvae Larval dynamics References Growth L-W relationship L-L relationship Length frequencies Recruitment Max. age & size Metabolism Morphology Morphometrics Gill area Brains Vision Collaborators Genetics Allele frequencies Heritability Strains Aquaculture Aquaculture profile Diseases Ecotoxicology Processing Speed Swim. type Stamps
	Note: No data are available if label is black .
Tools:	Biogeographic modelling | E-book | Field guide | Identification keys | Length-frequency Wizard | Life-history tool |
Internet sources:	BiOSC Point Data | CISTI | Google | GOBASE | GenBank ( genome, nucleotide ) | PubMed | Scirus | Public aquariums | Tree of Life | Zoological Record Other web sites |
	Note: use the Back button of your browser to return to FishBase.
	Modified:  Torres, Armi G.	Entered:  Casal, Christine Marie V.

	Ref.:				Glossary
		(e.g. 9948)				(e.g. cephalopods)
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Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07